Fuel efficiency gains (if any) by going with lighter aftermarket wheels and summer tires...

[XLT22]

You'll save far more fuel by just slowing down to the speed limit or a couple MPH over it. Speed limits here are 65 and it's about 1.5-2mpg better to run 68 than 74.

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[PCfordguy]

You'll save far more fuel by just slowing down to the speed limit or a couple MPH over it. Speed limits here are 65 and it's about 1.5-2mpg better to run 68 than 74.

No argument there- but sometimes when ya gotta get somewhere ya just gotta let er rip. I typically drive slow and conservative on short trips and get great mileage 23-26.

 

[WhiteLightningnshitshadow]

Rotating mass is the single largest impact. Running the combination that is lightest and thinnest really is the goal. The stock 18s on the XLTs were pretty light and cheap.

 

[flixden]

Whatever you do, make sure your new wheels have the same offset as your OEM wheels to avoid any problems. A lighter wheel/tire combo will allow your suspension to be more compliant , fuel savings will be minimal.

What's the problem with a slightly different offset wheel vs OEM? MPG loss, or are you referring to any other potential problems?
Seems like most people with aftermarket wheels go with a smaller offset.

 

[My 2ND Ford]

What's the problem with a slightly different offset wheel vs OEM? MPG loss, or are you referring to any other potential problems?
Seems like most people with aftermarket wheels go with a smaller offset.

When you change your wheels to a different offset you are putting additional stress on the wheel bearings. Too much change either positive or negative can cause premature failure of the wheel bearings or other components . Lots of people do it, just need to be prepared for possible early replacement.

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